Bookshelf for Super-Lazy People #2

Thought up this idea an hour ago and quickly drew it, so I’m skipping details.
It’s actually not as simple as it looks in terms of the structure I found, so many of you will notice what I omitted, but I hope you get the concept.

While the long bookshelf moves from side to side, the handle part doesn’t. Choose a small bookshelf and pull the bar down, and it comes down on the desk.

So here you can be lazy again, take and put back the books while you’re sitting at the desk.